We have not long lived in our current house and until now I haven’t really done much in the garage. However my 3500s project has just come back from paint and there is plenty of mechanical work to do. The last owner was a builder and he built the house. Outside is a block paved drive way and he continued this into the integral garage. Although this is fine for parking cars I am a little wary of jacking and supporting the car on it. Do you think it will be ok? Do you think I need some steel spreader plates? What about using a trolley jack? The jack needs to move freely on its wheels. Any thoughts. Should I concrete it?